package com.ns002.yigou.quote.common.app;

import okhttp3.*;
import okio.Buffer;
import okio.BufferedSource;

import java.io.IOException;
import java.nio.charset.Charset;
import java.util.concurrent.TimeUnit;

/**
 * An OkHttp interceptor which logs request and response information. Can be applied as an
 * {@linkplain OkHttpClient#interceptors() application interceptor} or as a {@linkplain
 * OkHttpClient#networkInterceptors() network interceptor}. <p> The format of the logs created by
 * this class should not be considered stable and may change slightly between releases. If you need
 * a stable logging format, use your own interceptor.
 */
public final class HttpLoggingInterceptor implements Interceptor {
    private static final Charset UTF8 = Charset.forName("UTF-8");

    public enum Level {
        /**
         * No logs.
         */
        NONE,
        /**
         * Logs request and response lines.
         * <p>
         * <p>Example:
         * <pre>{@code
         * --> POST /greeting http/1.1 (3-byte body)
         *
         * <-- 200 OK (22ms, 6-byte body)
         * }</pre>
         */
        BASIC,
        /**
         * Logs request and response lines and their respective headers.
         * <p>
         * <p>Example:
         * <pre>{@code
         * --> POST /greeting http/1.1
         * Host: example.com
         * Content-Type: plain/text
         * Content-Length: 3
         * --> END POST
         *
         * <-- 200 OK (22ms)
         * Content-Type: plain/text
         * Content-Length: 6
         * <-- END HTTP
         * }</pre>
         */
        HEADERS,
        /**
         * Logs request and response lines and their respective headers and bodies (if present).
         * <p>
         * <p>Example:
         * <pre>{@code
         * --> POST /greeting http/1.1
         * Host: example.com
         * Content-Type: plain/text
         * Content-Length: 3
         *
         * Hi?
         * --> END GET
         *
         * <-- 200 OK (22ms)
         * Content-Type: plain/text
         * Content-Length: 6
         *
         * Hello!
         * <-- END HTTP
         * }</pre>
         */
        BODY
    }

    public interface Logger {
        void log(String message);

    }

    public HttpLoggingInterceptor(HttpLoggingInterceptor.Logger logger) {
        this.logger = logger;
    }

    private final HttpLoggingInterceptor.Logger logger;

    private volatile HttpLoggingInterceptor.Level level = HttpLoggingInterceptor.Level.NONE;

    /**
     * Change the level at which this interceptor logs.
     */
    public HttpLoggingInterceptor setLevel(HttpLoggingInterceptor.Level level) {
        if (level == null) throw new NullPointerException("level == null. Use Level.NONE instead.");
        this.level = level;
        return this;
    }

    public HttpLoggingInterceptor.Level getLevel() {
        return level;
    }

    @Override
    public Response intercept(Chain chain) throws IOException {
        HttpLoggingInterceptor.Level level = this.level;

        Request request = chain.request();
        if (level == HttpLoggingInterceptor.Level.NONE || request.url().toString().contains("forward/queryQuote")
                || request.url().toString().contains("api/quotations/realTime") || request.url().toString().contains("price-server/price/quote")
                || request.url().toString().contains("gain-price-server/price/tradeShop/sdk/quote")) {
            //行情因为是轮询，日志不能用于输出
            return chain.proceed(request);
        }

        boolean logBody = level == HttpLoggingInterceptor.Level.BODY;
        boolean logHeaders = logBody || level == HttpLoggingInterceptor.Level.HEADERS;

        RequestBody requestBody = request.body();
        boolean hasRequestBody = requestBody != null;

        Connection connection = chain.connection();
        Protocol protocol = connection != null ? connection.protocol() : Protocol.HTTP_1_1;
//        String requestStartMessage = "--> " + request.method() + ' ' + request.url() + ' ' + protocol;
//        if (!logHeaders && hasRequestBody) {
//            requestStartMessage += " (" + requestBody.contentLength() + "-byte body)";
//        }
//        logger.log(requestStartMessage);

//        if (logHeaders) {
//            if (hasRequestBody) {
//                // Request body headers are only present when installed as a network interceptor. Force
//                // them to be included (when available) so there values are known.
//                if (requestBody.contentType() != null) {
//                    logger.log("Content-Type: " + requestBody.contentType());
//                }
//                if (requestBody.contentLength() != -1) {
//                    logger.log("Content-Length: " + requestBody.contentLength());
//                }
//            }
//
//            Headers headers = request.headers();
//            for (int i = 0, count = headers.size(); i < count; i++) {
//                String name = headers.name(i);
//                // Skip headers from the request body as they are explicitly logged above.
//                if (!"Content-Type".equalsIgnoreCase(name) && !"Content-Length".equalsIgnoreCase(name)) {
//                    logger.log(name + ": " + headers.value(i));
//                }
//            }
//
//            if (!logBody || !hasRequestBody) {
//                logger.log("--> END " + request.method());
//            } else if (bodyEncoded(request.headers())) {
//                logger.log("--> END " + request.method() + " (encoded body omitted)");
//            } else {
//                Buffer buffer = new Buffer();
//                requestBody.writeTo(buffer);
//
//                Charset charset = UTF8;
//                MediaType contentType = requestBody.contentType();
//                if (contentType != null) {
//                    charset = contentType.charset(UTF8);
//                }
//
//                logger.log("");
//                logger.log(buffer.readString(charset));
//
//                logger.log("--> END " + request.method()
//                        + " (" + requestBody.contentLength() + "-byte body)");
//            }
//        }

        long startNs = System.nanoTime();
        Response response = chain.proceed(request);
        long tookMs = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startNs);

        ResponseBody responseBody = response.body();
        long contentLength = responseBody.contentLength();
        String bodySize = contentLength != -1 ? contentLength + "-byte" : "unknown-length";
        logger.log("<-- " + request.method() + "  " + response.code() + ' ' + response.message() + ' '
                + response.request().url() + " (" + tookMs + "ms" + (!logHeaders ? ", "
                + bodySize + " body" : "") + ')');

        if (logHeaders) {
            Headers headers = response.headers();
            for (int i = 0, count = headers.size(); i < count; i++) {
//                logger.log(headers.name(i) + ": " + headers.value(i));
            }

            if (!logBody) {
//                logger.log("<-- END HTTP");
            } else if (bodyEncoded(response.headers())) {
//                logger.log("<-- END HTTP (encoded body omitted)");
            } else {
                BufferedSource source = responseBody.source();
                source.request(Long.MAX_VALUE); // Buffer the entire body.
                Buffer buffer = source.buffer();

                Charset charset = UTF8;
                MediaType contentType = responseBody.contentType();
//                if (contentType != null) {
//                    try {
//                        charset = contentType.charset(UTF8);
//                    } catch (UnsupportedCharsetException e) {
//                        logger.log("");
//                        logger.log("Couldn't decode the response body; charset is likely malformed.");
//                        logger.log("<-- END HTTP");
//
//                        return response;
//                    }
//                }

                if (contentLength != 0) {
//                    logger.log("");
                    logger.log(buffer.clone().readString(charset));
                }

                logger.log("<-- END HTTP (" + buffer.size() + "-byte body)");
            }
        }

        return response;
    }

    private boolean bodyEncoded(Headers headers) {
        String contentEncoding = headers.get("Content-Encoding");
        return contentEncoding != null && !contentEncoding.equalsIgnoreCase("identity");
    }
}